We have received a lot of information in references to the side effects of CPAP machines and how they can be stopped or alleviated... a major side effect chronic congestion and increased mucus production is due to the fact that your body, when coming in contact with air not at the desired humidity level, begins to increase mucus production to compensate for the loss moisture being received the lungs. Most, if not all, of this problem can be eliminated using a good heated humidifier. I agree with Debbie, get a new machine with upgraded features and an integrated heated humidifier - it will make a HUGE difference! Good luck...